Preference is one thing. I've had to run dual OS for well over 20 years just to complete the things I needed to get done. I see no reason to buy PC hardware anymore. Mac hardware dual boots and is not nearly as pricey as you suggest.
Salty Fog Rally 2007, 2009, 2011, 2012, AND LOOKING FORWARD TO 2014!
I haven't purchased any Apple products since I bought their stock several years ago. Oppan Gangnam Style.